I'm working on a Hyster H155xl S#F6A4128L. My engine is filling up with hydraulic fluid in about 1 week. It has a Perkins Diesel. Hyd. pump is run off drive shaft. The only thing connecting the engine to hydraulic system is the power steering pump. I put a new pump in about four weeks ago. After 2 weeks cust called and said it was same problem. I checked and eng. was overfull again. We figured we got a defective pump and put another new pump in. Out of curiosity I went and checked today.....overfull again. Any thoughts on what it could be???
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Wild guess. Could it be coming from the bell housing getting overfull and a bad seal on the crankshaft?
yep bb makes a good suggestion
check the hydraulic oil and see if the level is dropping, you have not mentioned having to add any.
is this customer a multishift operation?
are you sure their people are not just adding motor oil to the engine thinking it needs it? Then reporting back that it is overfull from the next guy?
I have seen these things happen
the extra oil has to be coming from somewhere
I assume that the hyd tank looses oil in direct correlation to the engine overfilling? I've personally never seen a hyd system loose oil to the engine through a hyd or p/s pump. How do you know the excess oil isn't diesel as this option seems more plausible?
No separate pump for brakes. I am sure its not diesel. I double checked.
Jim does this unit have a separate pump for bydro boost brakes? I have never worked on one these but just a suggestion on something i would look for. You sure it is hydo fluid as a defective injector pump could be filling crank with diesel.
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